Paddle-wheel



UNITED STATES,WV PATENT OFFICE. i

ABNER CHAPMAN, OF FAIRFAX, VERMONT` i I' i PADDLE-WHEEL Specification ofLetters Patent No. 11,741, dated October 3, 1854.

To all wh-0m t may concern Be it known that I, ABNER CHAPMAN, ofFairfax, in the county of Franklin and State of Vermont, have invented anew and Improved Paddle-Wheel; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings and to the letters markedthereon.

In the drawings Figure 1, is a side elevation. Fig. 2, is a faceelevation.

Like letters refer to like parts in the different figures.

The nature of my invention relates to a paddle wheel, composed of adouble series of segments curved in opposite directions, and so arrangedas to form continuous waved lines, when combined with the open vspacebetween said series-the whole being arranged in the manner, and for thepurpose hereafter to be described.

In order to describe the curves for my particular wheel when the breadthof the face and the diameter are given, I commence `by dividing the facei'nto four rings of equal width, exclusive of the open space in thecenter from siX to seven inches. I then divide the rings into an evennumber of equal segments the length of each of which are as near aspossible, five eighths of the half breadth of t-he face. Thus forexample, if the wheel is to be ten feet in breadth and twenty five feetin diameter, the half breadth or rings, Fig. 2, will be each five feetwide, five eighths of this measure is thirty-seven and a half inches,which divided into the circumference of the 25 foot wheel, or 78 ft,6,15 inches will give 24 equal parts, as the number of parts mustnecessarily be equal, in order that the buckets may be continuous andsymmetrical the number in the present case is 24L-each of which will be3% inches long. When the breadth and length of the sections are thusdetermined the buckets may be laid out in the following manner. Draw thetwo parallel lines A, B, at a distance from each other equal to thebreadth of the rings C, C,

points of division thus obtained, draw the lines d, d, d, perpendicularto A and B. Now divide the spaces e z' into five equal parts and numberthe points of division alternately from the right and left, a, b, 0, d,e. Then divide the spaces e, e, z', z' also into 5 equal partsalternately on the lines A, and B, and designate the points of division1, 2, 3, 4, 5; draw the lines al, b2, c3, e4. When this is done draw thecurved lines H H tangent to the lines al b2 &c. The curves thus obtainedform the continuous wave line of half the bucket of the wheel. The waveline of the other half of the bucket is identical with the first but thelines e e z", are intermediate between those of the first. The linesthus obtained give the form of the wheel or bucket at the periphery ofthe wheel.

In order to obtain the form of the inner edge of the bucket a seconddiagram Fig. 4, must be made in the same manner as the first, and thespaces e2 e2, 2 2 must be equal .to the distance between the radiallines e, g,

(drawn from the divisions of the circumference of the wheel at the inneredge of the buckets). When the curves of the outer andinner edges of thebuckets are thus obtained, the section of which the bucket is formed maybe readily bent to a proper shape upon a mold of a proper form. Such amold may be made by constructingtwo templates the one of the same curveas the outer edge of the bucket, obtained as described above. The otherof the same curve as the corresponding inner edge thereof. These twotemplates must be connected by cross ties of a length equal to thebreadth of the bucket. Their corresponding curved edges should then beconnected by staves, to,form the curved surface upon which the sheet ofiron, or other material of which the bucket is to be formed, may bebent. The bent section may then be attached to the radial arms in theusual manner toform the wheel with the space in the center. The radialarms on which these curved buckets are secured are arranged as seen inthe drawings Figs. l, and 2.

Having thus fully described the nature of my invention, I would statethat, I am aware that paddle Wheels With Zig-zag buckets, having sharpquick turns, have been made. These I do not claim, but

What I do claim as new and desire to se- 5 cure by Letters Patent, is-

1 A paddle Wheel composed of a double series of segments, curved inopposite directions, and so arranged as to form continuous waved lines,when this is combined With the unbroken open spacebetvveen said Se- 10ries-theA Whole being arranged n the manner, and for the purpose setforth.

ABNER CHAPMAN. [ns] Witnesses:

H. F. WILLsoN, SAML. GRUBB.

